In a post Tuesday we noted that Wisconsin is among the blue states currently in play, and which Romney could win. Now comes some evidence. It’s a Rasmussen poll, out today, and it carries a portents of a foul November for President Obama.

Mitt Romney now leads President Obama for the first time in Wisconsin where the president’s support has fallen to its lowest level to date.

The latest Rasmussen Reports statewide telephone survey of Likely Voters shows Romney with 47% of the vote to Obama’s 44%. Five percent (5%) prefer some other candidate, and four percent (4%) are undecided. (To see survey question wording, click here.)

Prior to this survey, Obama’s support in the state has ranged from 45% to 52%, while Romney has earned 41% to 45%. Last month, the numbers were Obama 49%, Romney 45%. The president led his likely Republican challenger by 11 points in March – 52% to 41%.

The same poll found that a narrow majority of 51% views public sector unions unfavorably, in Wisconsin, the state that made public sector unions legal in 1959. The unions overreached badly in the Walker recall, and they and Obama are starting to pay the price for that. Obama himself is underwater on job approval in WI, 47% approving and 52% disapproving, with 44% strongly disapproving. Obama also faces a huge gender gap in Wisconsin: He’s losing male voters 52-37.

Watch and see if anyone in the mainstream media picks up on that gender gap, which is nearly twice as large as Romney’s 8-point gap with Wisconsin women.

Exit question: What would a Romney/Walker ticket do, aside from driving Big Labor into full blown aneurysms?